31033020113021 has 4 divisors (see below), whose sum is σ = 31142677428192. Its totient is φ = 30923362797852.

The previous prime is 31033020112961. The next prime is 31033020113057. The reversal of 31033020113021 is 12031102033013.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31033020113021 - 2²² = 31033015918717 is a prime.

It is a super-2 number, since 2×31033020113021² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31033020112984 and 31033020113002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31033020113521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54828657161 + ... + 54828657726.

It is an arithmetic number, because the mean of its divisors is an integer number (7785669357048).

Almost surely, 2^{31033020113021} is an apocalyptic number.

It is an amenable number.

31033020113021 is a deficient number, since it is larger than the sum of its proper divisors (109657315171).

31033020113021 is a wasteful number, since it uses less digits than its factorization.

31033020113021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109657315170.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31033020113021 its reverse (12031102033013), we get a palindrome (43064122146034).

The spelling of 31033020113021 in words is "thirty-one trillion, thirty-three billion, twenty million, one hundred thirteen thousand, twenty-one".